This HPE Compatible 256GB (1x256GB) Octal Rank x4 CAS-46-39-39 EC8 Registered 3DS Smart Memory Kit is qualified for use in HPE ProLiant Gen11 servers with Intel processors. 3DS octal-rank architecture delivers the highest capacity per DIMM slot for large in-memory databases and HPC workloads. HPE Smart Memory validated. Limited lifetime warranty.